@misc{indiciae0906b1ffa5a8,
  title = {[Sample studies as a basic element of developing the sociohygienic observation method].},
  author = {E N Shigan},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5737190/},
  note = {Source identifier: 5737190}
}